Terpenoid: Organic Compound, Lipid, Antineoplastic, Functional Group, Pharmaceutical

Steroid: Terpenoid, Lipid, Sterane, Functional Group, Carbon

Substitution Reaction: Chemical Compound, Functional Group, Organic Chemistry, Electrophile

Santonic Acid: Organic Compound, Carboxylic Acid, Functional Group, Ketone

Acyl chloride: Organic chemistry, compound, Functional group, Carbonyl, Chlorine, radical